Metals Passivation

The Fluid Catalytic Cracking Unit (FCCU, Cat Cracker or Cat Unit) is critical to the catalytic process used by most refineries to convert heavy gasoil and resid into gasoline and distillates. Metallic impurities, such as Nickel and Vanadium, adversely impact the catalyst’s capability to produce the desired products. For many years, Nalco Champion has been at the forefront of passivation research and solutions addressing these challenges.

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Nickel PassivationNickel is an impurity in the feed to FCC units. It competes with the FCC catalyst to promote dehydrogenation reactions, resulting in more hydrogen and coke formation and less production of valuable products. Nickel can also constrain throughput. Our nickel passivation solutions for FCCs inhibit its activity as a competitive catalyst, allowing the unit to proceed at top efficiency. Benefits include:

More selective production

Less demand on the wet gas compressor

Less demand on the regenerator air blower

Improved cat-to-oil ratio

Vanadium PassivationVanadium can behave as a competitive catalyst similar to nickel. Additionally, vanadium will combine with sodium to form a component that destroys the FCC catalyst’s active sites. Without passivation, vanadium can lead to reduced catalyst specificity, increased cost in catalyst replacement and, potentially, increased coke and hydrogen production. Introduce our patented technology into your system to passivate vanadium and minimize its problems. Benefits are:

Reduced costs of replacement catalyst

More selective production

Improved cat-to-oil ratio

Increased production

Capability to process feeds with higher vanadium

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